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arXiv 2201.03828astro-ph.HE
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考虑热传导和各向异性压力的热吸积流的自相似解

Self-similar Solution of Hot Accretion Flow with Thermal Conduction and Anisotropic Pressure

Amin Mosallanezhad, Fatemeh Zahra Zeraatgari, Liquan Mei, De-Fu Bu

摘要:

通过求解轴对称的稳态磁流体动力学方程,我们研究了各向异性热传导、各向异性压力和磁场强度对黑洞周围热吸积流的影响。各向异性压力被认为是在具有极低质量吸积率的热吸积流中弱碰撞等离子体中传输角动量的机制。然而,各向异性压力并不广泛影响角动量的传输,它导致风区的收缩。结果表明,磁场的强度可以帮助坡印亭能通量克服动能通量。这一结果可能适用于理解银河系中心Sgr A* 和M87星系的热吸积流。

英文摘要:

We explore the effects of anisotropic thermal conduction, anisotropic pressure, and magnetic field strength on the hot accretion flows around black holes by solving the axisymmetric, steady-state magnetohydrodynamic equations. The anisotropic pressure is known as a mechanism for transporting angular momentum in weakly collisional plasmas in hot accretion flows with extremely low mass accretion rates. However, anisotropic pressure does not extensively impact the transport of the angular momentum, it leads to shrinkage of the wind region. Our results show that the strength of the magnetic field can help the Poynting energy flux overcomes the kinetic energy flux. This result may be applicable to understand the hot accretion flow in the Galactic Center Sgr A* and M87 galaxy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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